Pushover analysis of asymmetric three-dimensional building frames

• Type: Article in International Scientific Journal
• Date: 2005

Authors

Rui Carneiro de Barros (Author) FEUP; Almeida, R (Author) Other

Journal

Title: Journal of Civil Engineering and Management

Vol. 11

Pages: 3-12

ISSN: 1392-3730

Publisher: Vilnius Gediminas Technical University

Indexing

Scopus - 31 Citations

Other information

Authenticus ID: P-007-CQN

Abstract (EN): The effect of higher modes of vibration on the total non-linear dynamic response of a structure is a very important and unsolved problem. To simplify the process the static non-linear pushover analysis was proposed associated with the capacity spectrum method, utilising a load pattern proportional to the shape of the fundamental mode of vibration of the structure. The results of the pushover analysis, with this load pattern, are very accurate for structures that respond primarily in the fundamental mode. But when the higher modes of vibration become important for the total response of the structure, this load pattern loses its accuracy. To minimise this problem a new multimode load pattern is proposed based on the relative participation of each mode of vibration in the elastic response of a structure subjected to an earthquake ground motion. This load pattern is applied to the analyses of symmetric frames as well as to stiffness asymmetric and mass asymmetric irregular building frames, under seismic actions of distinct orientations, permitting to draw significant conclusions.

Language: English

Type (Professor's evaluation): Scientific